(19)

(11)

EP 2 090 069 A1

(12)

(43) Date of publication: 19.08.2009 Bulletin 2009/34 (21) Application number: 06829931.2 (22) Date of filing: 03.11.2006

(51) International Patent Classification (IPC):  H04L 29/06(2006.01) (86) International application number: PCT/EP2006/068073 (87) International publication number: WO 2008/052598 (08.05.2008 Gazette 2008/19)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (71) Applicant: Telefonaktiebolaget LM Ericsson (publ) 164 83 Stockholm (SE)	(72) Inventors: ÅSTRÖM, Bo 117 59 Stockholm (SE) PEHRSSON, Arne 141 71 Huddinge (SE) NORELL, Lennart 125 30 Älvsjö (SE) (74) Representative: Mitchell, Matthew Benedict David  Marks & Clerk LLP 4220 Nash Court Oxford Business Park South Oxford OX4 2RU Oxford Business Park South Oxford OX4 2RU (GB)